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D_Dragon

GTX670 regular black screens

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Until this moring I used a Sapphire Radeon HD 7770. On the first DVI I had a TH2GO DE with 3 22" WS monitors. On the second DVI a 17" monitor. I used the 3 screens for the outside view and the 4th monitor for the instruments. Framerate appr. 17-19 on average. I decided to (finally) go for Nvidia and ordered an EVGA GTX670 which I picked up early in the afternoon. After coming home I removed the AMD card and installed the Nvidia one. I removed the AMD drivers and installed the drivers from the supplied CD (301.25).

 

Before the switch I ran 3DMark Vantage and got a Pscore of 11804 (GPU 12726 and CPU 9696). I am still running on and old Q6600 processor at 2.76 GHz with 4 GB of RAM. After the switch I ran 3DMark Vantage again and got a very good (and unexpected high) result. A whopping score of 24980 (GPU 21654 and CPU 46324). The CPU score amazed me, I hadn't changed anything there. It looked like the AMD card was holding the processor on the parkingbrake or something like that. So I was very anxious to see the results for FSX.

 

With the AMD card I ran FSXMark11 on my setup (not a clean install, just for reference). Out of the five measurements I got an average of 14.437-14.860 (min 10, max 20) with frames from 4356 to 4458. Hardly what you can call a good framerate. After installing the latest stable version (301.42) I ran the FSXMark11 again. First the results, then the problems. I got an average of 16.120 to 21.280 over five runs (min 0, max 29) with frames from 4836 to 6384. As you can see very odd results.

 

What's happening. Each time I touch a key or click a mouse button when FSX is started, all my four screens go black for 7-20 seconds. Very often I get the 'No signal' message on the screens. The TH2GO DE blinks red for about a second, then flashes green while the screens come back to life one by one. That can account for the minimum of 0 frames (blank screen). The rest of the figures look promising enough, but flying while everything is (very often) completely dark can hardly be called fun.

 

It also isn't possible to move the instuments to my fourth monitor as with the AMD card. Everytime the screens go black, the mouse cursor is placed in the center of this 4th monitor. Via the TH2GO DE I am running 5040x1050 (3x 1680x1050) so this is an improvement over the AMD card. Im am running FSX in full screen. I have hardly any experience with Nvidia cards (just the results of this afternoon) so there might be something I am overlooking in my setup.

 

Please can anybody help me, else I will have to go back to the AMD card and I really don't want that. I know the GTX670 is capable of driving three screens like the TH2GO DE does and still be able to use the fourth monitor for something else (instruments), but I am thinking of using the TH2GO DE for a (wide) instrument panel over two or three monitors in the (far) future. So I would like to have a solution for my current setup. BTW, both the firmware as the driver of the TH2GO DE are already updated to the latest version (dated somewhere in june 2011 if I recall my memory correctly).

 

Greetings,

 

Theo

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Further investigations.

 

Today I continued to try to taccle this problem. First I connected the monitors straight to the GTX670. Two of them with a DVI-DVI cable, the 3rd with a DVI-HDMI cable and the 4th (the separate monitor) with an active DP-DVI adapter and a DVI-DVI cable. Everything worked fine, but I couldn't use my 4th screen and the sequence of the three monitors wasn't correct. I could not swap them because of the length (or rather shortage) of one DVI-DVI cable.

 

Since I have an appointment with some people to fly in my simpit tonight, I decided to switch back to the 7770 AMD card. I have another (passive) DP converter somewhere and I will try that later. If I can get the 4th monitor to work, I will get a longer DVI-DVI cable so the GTX670 can work properly without the TH2GO DE.

 

After installing the drivers again and several reboots I could rename the saved FSX.CFG file from the 7770 version. After starting FSX I got black screens and nothing more. I decided to reinstall both the firmware and the drivers for the TH2GO DE. After several reboots and starting FSX again I got black screens all over the place randomly appearing and disappearing again and FSX didn't run.

 

So back to the GTX670 once more, I have to be able to fly tonight, even if it is in windowed mode. I swapped the GPU's again and connected all the screens and the TH2GO DE. When I removed the AMD drivers with DriverSweeper I realised that I hadn't done that when I went back to the 7770. I will have to give that one a go again tomorrow. Now I can fly in windowed mode anyway, so my friends can come flying in my simpit tonight after all.

 

Greetings,

 

Theo.

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You can run the outside view on the 3 monitors and instruments on the 4th without TH2Go. You can change the "sequence" of the monitors without physically moving the monitors via the Nvidia control panel. I can't recall what to click on precisely but if you look around the Nvidia control panel it should be fairly obvious.

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Today I first tried if the (passive) DP-DVI adapter I've got did work. It fortunately did so I decided to put the other leads also on the GTX670 and not using the TH2GO DE to see the result. In the previous attempt I already made a surround group and couldn't rearrange the order of the three screens. It appears that you need to arrange the screens before you put them in a group (that now seems logical).

 

After I created that group my fourth screen went black. In al the Nvidia screens it was greyed out. I finally found an option to 'rigorous detect screens (needed for TV screens)'. After selecting that option my fourth screen (the compaq monitor with the DP-DVI converter) was finally recognized and could be used.

 

Then I copied the .670 version of FSX.CFG over the existing FSX.CFG file and started FSX. In windowed mode all worked great, but in full screen mode I got the black screens again. So I think it is safe to say that the problem does not lie with the TH2GO DE, but in (the combination of FSX with) the GTX670.

 

I know some of you also run a GTX670. Do you run it in full screen or windowed mode. If in full screen do you also have (had) this problem. If so, what did you do to get rid of the black screens?

 

Greetings,

 

Theo.

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